107 lines
3.9 KiB
Ruby
107 lines
3.9 KiB
Ruby
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# A module describes the capabilities of a group of objects, ie what data it has
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# and functions it responds to.
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# The group may be a Class, but a module may be included into classes and objects too.
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#
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# The class also keeps a list of class methods (with names+code)
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# Class methods are instance methods on the class object
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# So it is essential that the class (the object defining the class)
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# can carry methods. It does so as instance variables.
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# In fact this property is implemented in the Object, as methods
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# may be added to any object at run-time
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module Parfait
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class Module < Object
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attribute :name
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attribute :instance_methods
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attribute :super_class
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attribute :meta_class
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def initialize name , superclass
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super()
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self.name = name
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self.instance_methods = List.new
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self.super_class = superclass
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self.meta_class = nil#MetaClass.new(self)
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end
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def method_names
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names = List.new
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self.instance_methods.each do |method|
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names.push method.name
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end
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names
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end
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def add_instance_method method
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raise "not a method #{method.class} #{method.inspect}" unless method.is_a? Method
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raise "syserr #{method.name.class}" unless method.name.is_a? Symbol
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found = get_instance_method( method.name )
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if found
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self.instance_methods.delete(found)
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#raise "existed in #{self.name} #{Sof.write found.source.blocks}"
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end
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self.instance_methods.push method
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#puts "#{self.name} add #{method.name}"
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method
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end
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def remove_instance_method method_name
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found = get_instance_method( method_name )
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if found
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self.instance_methods.delete(found)
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else
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raise "No such method #{method_name} in #{self.name}"
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end
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self.instance_methods.delete found
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end
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def create_instance_method method_name , arg_names
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raise "uups #{method_name}.#{method_name.class}" unless method_name.is_a?(Symbol)
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clazz = object_layout().object_class()
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raise "??? #{method_name}" unless clazz
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#puts "Self: #{self.class} clazz: #{clazz.name}"
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Method.new( clazz , method_name , arg_names )
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end
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# this needs to be done during booting as we can't have all the classes and superclassses
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# instantiated. By that logic it should maybe be part of vm rather.
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# On the other hand vague plans to load the hierachy from sof exist, so for now...
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def set_super_class sup
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self.super_class = sup
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end
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def get_instance_method fname
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raise "uups #{fname}.#{fname.class}" unless fname.is_a?(Symbol)
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#if we had a hash this would be easier. Detect or find would help too
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self.instance_methods.each do |m|
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return m if(m.name == fname )
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end
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nil
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end
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# get the method and if not found, try superclasses. raise error if not found
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def resolve_method m_name
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raise "uups #{m_name}.#{m_name.class}" unless m_name.is_a?(Symbol)
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method = get_instance_method(m_name)
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return method if method
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if( self.super_class )
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method = self.super_class.resolve_method(m_name)
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raise "Method not found #{m_name}, for \n#{self}" unless method
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end
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method
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end
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# :<, :<=, :>, :>=, :included_modules, :include?, :name, :ancestors, :instance_methods, :public_instance_methods,
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# :protected_instance_methods, :private_instance_methods, :constants, :const_get, :const_set, :const_defined?,
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# :const_missing, :class_variables, :remove_class_variable, :class_variable_get, :class_variable_set,
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# :class_variable_defined?, :public_constant, :private_constant, :singleton_class?, :include, :prepend,
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# :module_exec, :class_exec, :module_eval, :class_eval, :method_defined?, :public_method_defined?,
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# :private_method_defined?, :protected_method_defined?, :public_class_method, :private_class_method, :autoload,
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# :autoload?, :instance_method, :public_instance_method
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end
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end
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